JPH0414330B2 - - Google Patents
Info
- Publication number
- JPH0414330B2 JPH0414330B2 JP57085454A JP8545482A JPH0414330B2 JP H0414330 B2 JPH0414330 B2 JP H0414330B2 JP 57085454 A JP57085454 A JP 57085454A JP 8545482 A JP8545482 A JP 8545482A JP H0414330 B2 JPH0414330 B2 JP H0414330B2
- Authority
- JP
- Japan
- Prior art keywords
- partition plate
- slit
- blade
- focal plane
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005192 partition Methods 0.000 claims description 38
- 230000035515 penetration Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 description 16
- 230000003287 optical effect Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
- G03B9/18—More than two members
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shutters For Cameras (AREA)
Description
【発明の詳細な説明】
本発明は分割羽根式フオーカルプレンシヤツタ
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a split blade focal plane shutter.
従来技術を第５図及び第６図に基づいて説明す
る。第５図は、２本のアームとシヤツタ羽根とを
４節リンクを構成するように結合したものを２組
用意し、これら２組のシヤツタ羽根を所定の順序
で平行移動させることによつて所望のスリツトを
形成するフオーカルプレンシヤツタを示す。この
種のフオーカルプレンシヤツタにおいては通常24
mm×36mmの長方形のアパーチユアを前記シヤツタ
羽根が開閉するようになつている。順次積み重ね
るようにして配置されたシヤツタ羽根１ａ，２
ａ，３ａは先羽根群を構成する。シヤツタ羽根
（スリツト形成羽根）１ａはスリツトの一方のエ
ツジを形成するものである。以上の構成において
先羽根群１ａ，２ａ，３ａは４節リンクによつて
アパーチユアＡの一方の側を該アパーチユアの短
辺方向に平行移動する。シヤツタ羽根１ｂ，２
ｂ，３ｂは後羽根群を構成する。シヤツタ羽根
（スリツト形成羽根）１ｂはスリツトの他方のエ
ツジを形成するものである。後羽根群１ｂ，２
ｂ，３ｂは４節リンクによつてアパーチユアＡの
他方の側を上記短辺方向に平行移動する。先羽根
群と後羽根群との間にはアパーチユアＡを穿設さ
れた仕切板２０が挿入されている。 The prior art will be explained based on FIGS. 5 and 6. FIG. 5 shows that two sets of two arms and shutter blades are connected to form a four-bar link, and these two sets of shutter blades are moved in parallel in a predetermined order to create a desired result. The focal plane ivy forming the slit is shown. In this kind of focal plane ivy it is usually 24
The shutter blade opens and closes a rectangular aperture measuring mm x 36 mm. Shutter blades 1a and 2 arranged in a stacked manner
a and 3a constitute a leading blade group. The shutter blade (slit forming blade) 1a forms one edge of the slit. In the above configuration, the leading blade groups 1a, 2a, and 3a move parallel to one side of the aperture A in the direction of the short side of the aperture A by the four-bar link. Shutter blades 1b, 2
b and 3b constitute a rear blade group. The shutter blade (slit forming blade) 1b forms the other edge of the slit. Rear blade group 1b, 2
b and 3b move the other side of the aperture A in parallel in the above-mentioned short side direction by means of four-bar links. A partition plate 20 having an aperture A is inserted between the leading blade group and the trailing blade group.
以上のように構成されたフオーカルプレンシヤ
ツタは、先ず第５図に示したシヤツタチヤージ時
において、先羽根群のシヤツタ羽根１ａ，２ａ，
３ａは展開されてアパーチユアＡを被い、また後
羽根群１ｂ，２ｂ，３ｂはアパーチユアＡの上端
外に積層されている。次に、シヤツタレリーズさ
れると先羽根群１ａ，２ａ，３ａを順次アパーチ
ユアＡから退避させ、その下端外に積層する。ま
た先羽根群の作動開始時点から所定のシヤツタ秒
時の経過後に後羽根群１ｂ，２ｂ，３ｂは順次ア
パーチユアＡの上端から下端に向つて展開し、こ
れを被う。 In the focal plane shutter constructed as described above, first, at the time of shutter charging shown in FIG.
3a is unfolded to cover the aperture A, and the rear blade groups 1b, 2b, 3b are stacked outside the upper end of the aperture A. Next, when the shutter is released, the leading blade groups 1a, 2a, and 3a are sequentially retracted from the aperture A and stacked outside the lower end thereof. Further, after a predetermined shutter time has elapsed from the start of operation of the leading blade group, the trailing blade groups 1b, 2b, and 3b sequentially expand from the upper end of the aperture A toward the lower end to cover it.
第６図は第５図のＢ矢視縦断面図であり、シヤ
ツタチヤージ完了状態を表わす。先羽根群１ａ，
２ａ，３ａはアパーチユアＡを被つており、また
後羽根群１ｂ，２ｂ，３ｂはアパーチユアＡの上
端外に積層されている。仕切板２０と同様な形状
の第１基板２１及び第２基板２２はアパーチユア
Ａと同一サイズのアパーチユアを有している。先
羽根群は第１基板２１と仕切板２０との間に、ま
た後羽根群は第２基板２２と仕切板２０との間に
それぞれ支持されている。シヤツタレリーズ動作
に応動した先、後羽根群は前述の如く所定の時
間々隔をおいて図中上方から下方へと走行する。
シヤツタ羽根の走行時のブレ（撮影レンズの光軸
Ｏ方向のブレ）は仕切板２０と両基板２１，２２
の挟持構造により規制される。 FIG. 6 is a longitudinal sectional view taken along arrow B in FIG. 5, and shows a state in which the shutter charge is completed. Leading blade group 1a,
2a, 3a cover the aperture A, and the rear blade groups 1b, 2b, 3b are stacked outside the upper end of the aperture A. A first substrate 21 and a second substrate 22 having the same shape as the partition plate 20 have an aperture having the same size as the aperture A. The leading blade group is supported between the first substrate 21 and the partition plate 20, and the trailing blade group is supported between the second substrate 22 and the partition plate 20. In response to the shutter release operation, the rear blade group travels from the top to the bottom in the figure at predetermined time intervals as described above.
The shake of the shutter blade when it is running (the shake in the direction of the optical axis O of the photographic lens) is caused by the partition plate 20 and both substrates 21 and 22.
It is regulated by the clamping structure.
さて、以上のような従来技術において先羽根群
１ａ，２ａ，３ａ及び後羽根群１ｂ，２ｂ，３ｂ
が走行完了する直前には通常ブレーキが掛けられ
る。即ち、(1)先羽根群の場合にはシヤツタ羽根３
ａ，２ａ，１ａが順に仕切板２０と第１基板２１
との間のアパーチユアＡの下端外に格納されてゆ
く作動シーケンスのなかで、スリツト形成羽根１
ａが板２０と２１との間に格納完了する直前（羽
根１ａのスリツト形成エツジたる上側先端がアパ
ーチユアＡ外に退避完了する直前）に駆動系にブ
レーキが掛けられる。(2)後羽根群の場合にはシヤ
ツタ羽根１ｂ，２ｂ，３ｂが順にアパーチユアＡ
を被うように展開されてゆく作動シーケンスのな
かで、スリツト形成羽根１ｂのスリツト形成エツ
ジたる下側先端がアパーチユアＡを走行終了する
直前（羽根１ｂの下側先端が仕切板２０と第２基
板２２との間に突入する直前）にブレーキが掛け
られる。これはシヤツタ羽根のバウンドや、これ
に伴なう音や衝撃を軽減するための処置である。
しかし、これによつて次のような問題が生起して
いた。例えば、後羽根群のスリツト形成羽根１ｂ
がアパーチユアＡの走行終了直前に制動される
と、その運動エネルギーによつて該スリツト形成
羽根１ｂの中央部分は座屈して光軸方向に撓み仕
切板２０と衝突することがあつた。そのためにス
リツト形成羽根が破損したり、亀裂が入つたりし
ていた。特に高速シヤツタ秒時を得るためにシヤ
ツタ羽根を軽量化すると羽根の剛性が低下する傾
向にあるので、この問題は顕著になつてくる。ま
た、先羽根群のスリツト形成羽根１ａは制動時期
にはそのほとんどが仕切板２０と第１基板２１と
の間に入り込んでいるので上述のような座屈は板
２０，２１の間で発生する。そのためスリツト形
成羽根１ａの撓みは板２０，２１によつて抑えら
れるので該羽根が破損したり、亀裂が入つたりす
ることはない。しかし、特開昭51ー133015号、同
51−133061号公報に開示されているようにシヤツ
タ後羽根の走行完了に連動して先羽根群がアパー
チユアＡを再び被うように再び上方へ戻るような
形式のシヤツタではスリツト形成羽根１ａのスリ
ツト形成エツジがやはり仕切板と衝突する可能性
はある。 Now, in the prior art as described above, the leading blade groups 1a, 2a, 3a and the trailing blade groups 1b, 2b, 3b
The brakes are normally applied just before the vehicle completes its run. That is, (1) in the case of the leading blade group, the shutter blade 3
a, 2a, and 1a are the partition plate 20 and the first substrate 21 in this order.
In the operating sequence, the slit-forming blade 1 is retracted outside the lower end of the aperture A between the
A brake is applied to the drive system just before the blade 1a is completely retracted between the plates 20 and 21 (just before the upper tip of the blade 1a, which is the slit-forming edge, is completely retracted out of the aperture A). (2) In the case of the rear blade group, the shutter blades 1b, 2b, 3b are arranged in order in the aperture A.
Immediately before the lower tip of the slit forming blade 1b, which is the slit forming edge, finishes traveling through the aperture A (the lower tip of the blade 1b touches the partition plate 20 and the second substrate), 22), the brakes are applied. This is a measure to reduce the bouncing of the shutter blades and the accompanying noise and impact.
However, this has caused the following problems. For example, the slit forming blade 1b of the rear blade group
When the aperture A was braked just before the end of its travel, the central portion of the slit-forming blade 1b buckled due to its kinetic energy and collided with the flexible partition plate 20 in the optical axis direction. As a result, the slit forming blades were damaged or cracked. In particular, when reducing the weight of a shutter blade in order to obtain a high shutter speed, the rigidity of the blade tends to decrease, so this problem becomes more prominent. Furthermore, since most of the slit-forming blades 1a of the leading blade group are inserted between the partition plate 20 and the first substrate 21 during the braking period, the above-mentioned buckling occurs between the plates 20 and 21. . Therefore, the deflection of the slit-forming blade 1a is suppressed by the plates 20 and 21, so that the blade will not be damaged or cracked. However, JP-A-51-133015, the same
As disclosed in Japanese Patent No. 51-133061, in a shutter of the type in which the leading blade group returns upward again to cover the aperture A again in conjunction with the completion of travel of the shutter trailing blade, the slit of the slit-forming blade 1a is It is still possible for the forming edge to collide with the partition plate.
本発明は以上の欠点に鑑み、スリツト形成羽根
と仕切板との衝突を防止することによりシヤツタ
羽根の破損や損傷を防止することを目的とする。
以上の目的は、アパーチユア閉成方向のスリツト
形成羽根のスリツト形成エツジの走行軌道に面す
る該仕切板の部位に、スリツト形成羽根の進入量
に応じた所定の凹部を設けることにより達成され
る。 In view of the above drawbacks, it is an object of the present invention to prevent breakage or damage to the shutter blade by preventing collision between the slit forming blade and the partition plate.
The above object is achieved by providing a predetermined recess corresponding to the amount of penetration of the slit-forming blade in a portion of the partition plate facing the travel trajectory of the slit-forming edge of the slit-forming blade in the aperture closing direction.
以下、本発明を実施例に基づいて説明する。第
１図は本実施例のシヤツタチヤージ完了状態を示
す縦断面図、第２図は同シヤツタ走行完了状態を
示す縦断面図、第３図は本実施例の斜視図であ
る。第１図乃至第３図において、仕切板２０は積
層したときに一部ズレを得る開口を有する第１仕
切板２０ａと第２仕切板２０ｂとを積層して形成
されている。第１仕切板２０ａのアパーチユアの
長辺方向の上側端縁２０a′は、第２仕切板２０ｂ
の上側端縁２０b′がアパーチユアＡの輪郭だとす
ると、該端縁よりもスリツト形成羽根１ａのスリ
ツト形成エツジ１a′の走行方向（図中上方向）に
向つて所定幅ぶんだけ短くなつている。また、第
２仕切板２０ｂのアパーチユアＡの長辺方向の下
側端縁２０b″は、第１仕切板２０ａの下側端縁２
０a″がアパーチユアＡの輪郭だとすると、該端縁
よりもスリツト形成羽根１ｂのスリツト形成エツ
ジ１b′の走行方向（図中下方）に向つて所定幅ぶ
んだけ短くなつている。このようにすることによ
り、仕切板２０に向うスリツト形成羽根１ａ，１
ｂのスリツト形成エツジの走行軌道に面する仕切
板の部位R1，R2はアパーチユアＡの長辺側端縁
から所定幅ぶんだけスリツト形成羽根の走行方向
に凹まされたことになる。この所定幅はスリツト
形成羽根１ａ及び１ｂが仕切板２０と第１基板２
１との間及び仕切板２０と第２基板２２との間に
それぞれ進入する進入量以上になつている。 Hereinafter, the present invention will be explained based on examples. FIG. 1 is a longitudinal cross-sectional view showing the shutter charging completed state of this embodiment, FIG. 2 is a vertical cross-sectional view showing the same shutter running completion state, and FIG. 3 is a perspective view of the present embodiment. In FIGS. 1 to 3, the partition plate 20 is formed by laminating a first partition plate 20a and a second partition plate 20b, each having an opening that allows for partial misalignment when stacked. The upper edge 20a' of the aperture of the first partition plate 20a in the long side direction is connected to the second partition plate 20b.
If the upper edge 20b' is the outline of the aperture A, it is shorter than the edge by a predetermined width in the running direction (upward in the figure) of the slit forming edge 1a' of the slit forming blade 1a. Further, the lower edge 20b'' of the second partition plate 20b in the long side direction of the aperture A is the same as the lower edge 20b'' of the first partition plate 20a.
0a'' is the outline of the aperture A, it is shorter than the edge by a predetermined width in the running direction (downward in the figure) of the slit forming edge 1b' of the slit forming blade 1b.By doing this, , slit forming blades 1a, 1 facing the partition plate 20
Parts R 1 and R 2 of the partition plate facing the running track of the slit forming edge b are recessed from the long side edge of the aperture A by a predetermined width in the running direction of the slit forming blade. This predetermined width is such that the slit forming blades 1a and 1b are connected to the partition plate 20 and the first substrate 2.
1 and between the partition plate 20 and the second substrate 22.
このように、スリツト形成羽根１ａ，１ｂの光
軸方向への撓みに対する逃げを設けたから該スリ
ツト形成羽根が破損したり、亀裂を生ずることが
防止される。更に、各凹みR1，R2はそれぞれ第
１基板２０ａと第２基板２０ｂとで形成されてい
るので先羽根群１ａ，２ａ，３ａ又は後羽根群１
ｂ，２ｂ，３ｂがアパーチユアＡを被つた状態で
は各スリツト形成羽根１ａ及び１ｂは第２基板２
０ｂ及び第１基板２０ａとそれぞれ重なり合つた
状態となるので遮光性も満足される。尚、この実
施例ではアパーチユアＡを仕切板２０で規定した
が、例えば第１基板２１及び／又は第２基板２２
で規定すれば仕切板２０の開口はアパーチユアＡ
よりも若干大きいものでもよい。 In this way, since the slit forming blades 1a, 1b are provided with relief against deflection in the optical axis direction, the slit forming blades are prevented from being damaged or cracked. Furthermore, since the recesses R 1 and R 2 are formed by the first substrate 20a and the second substrate 20b, respectively, the leading blade groups 1a, 2a, 3a or the trailing blade group 1
b, 2b, 3b cover the aperture A, each slit forming blade 1a and 1b is attached to the second substrate 2.
0b and the first substrate 20a, the light shielding properties are also satisfied. In this embodiment, the aperture A is defined by the partition plate 20, but for example, the aperture A is defined by the first substrate 21 and/or the second substrate 22.
If defined by , the opening of the partition plate 20 is aperture
It may be slightly larger than that.
第４図は本発明の別の実施例を示す斜視図であ
り、１枚の仕切板２０にエツチング等の化学処理
によつて前記凹みを形成している。尚、この凹み
は角溝状に凹んでいる必要はなく、必要に応じて
適当な傾斜をつける等の変更が可能である。ま
た、この凹みは後羽根群のスリツト形成羽根１ｂ
に対して設けると非常に有効であるが、上記実施
例のように先、後羽根群のスリツト形成羽根１
ａ，１ｂに対して設けてもよい。該凹みを先羽根
群又は後羽根群に対して設けるのか、あるいは両
群に対して設けるのかは先、後羽根群の構造及び
作動シーケンスとの関係から決定すればよい。更
に、先、後羽根群のうちのスリツト形成羽根以外
の遮光羽根は例えば実公昭53−16893号にあるよ
うに回転動作させてもよい。また、遮光羽根は金
属、合成樹脂いづれでもよいし、羽根の走行方向
は第１図乃至第３図において上方へと走行するも
のであつてもよい。 FIG. 4 is a perspective view showing another embodiment of the present invention, in which the recesses are formed in one partition plate 20 by chemical treatment such as etching. Note that this recess does not need to be recessed in the shape of a square groove, and can be modified, such as adding an appropriate slope, as necessary. Also, this recess is the slit-forming blade 1b of the rear blade group.
However, as in the above embodiment, if the slit forming blades 1 of the leading and trailing blade groups are provided, it is very effective.
It may be provided for a and 1b. Whether the recess is provided for the leading blade group, the trailing blade group, or both groups may be determined based on the relationship with the structure of the trailing blade group and the operation sequence. Further, the light-shielding blades other than the slit forming blades in the front and rear blade groups may be rotated as disclosed in, for example, Japanese Utility Model Publication No. 16893/1983. Further, the light-shielding blades may be made of metal or synthetic resin, and the direction of travel of the blades may be upward in FIGS. 1 to 3.
以上のように本発明によれば先、後羽根群のス
リツト形成羽根と先、後羽根群との間に配設され
る仕切板との衝突が防止できシヤツタ羽根の耐久
性向上に効果がある。また遮光性も充分に満足い
くものとなる。 As described above, according to the present invention, collisions between the slit-forming blades of the leading and trailing blade groups and the partition plate disposed between the leading and trailing blade groups can be prevented and the durability of the shutter blades can be improved. . In addition, the light shielding properties are also sufficiently satisfactory.
第１図は本発明の実施例を示す縦断面図（シヤ
ツタチヤージ完了状態）、第２図は同縦断面図
（シヤツタ作動終了状態）、第３図は本発明の実施
例を示す斜視図、第４図は本発明の別の実施例を
示す斜視図、第５図は従来技術を示す平面図、第
６図は第５図のＢ矢視図である。
１ａ，２ａ，３ａ……先羽根群、１ｂ，２ｂ，
３ｂ……後羽根群、２０，２０ａ，２０ｂ……仕
切板、R1，R2……凹部。
Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention (shutter charge completed state), Fig. 2 is a longitudinal sectional view thereof (shutter operation completed state), and Fig. 3 is a perspective view showing an embodiment of the present invention. FIG. 4 is a perspective view showing another embodiment of the present invention, FIG. 5 is a plan view showing the prior art, and FIG. 6 is a view taken along arrow B in FIG. 1a, 2a, 3a... leading blade group, 1b, 2b,
3b... rear blade group, 20, 20a, 20b... partition plate, R 1 , R 2 ... recess.
Claims (1)
をそれぞれ有する先羽根群及び後羽根群と、該
先、後羽根群間に配設された仕切板とを備えた分
割羽根式フオーカルプレンシヤツタにおいて、 前記スリツト形成エツジがアパーチユアを閉成
する方向へ走行する際の軌道面に対向する前記仕
切板上の、前記アパーチユアを形成し前記スリツ
ト形成エツジに対して平行な一辺に、前記スリツ
ト形成エツジの進入量以上の所定の凹部を設けた
ことを特徴とする分割羽根式フオーカルプレンシ
ヤツタ。 ２ 特許請求の範囲第１項に記載のフオーカルプ
レンシヤツタにおいて、前記凹部は前記後羽根群
のスリツト形成羽根のスリツト形成エツジの走行
軌道に面する前記仕切板に設けられていることを
特徴とするフオーカルプレンシヤツタ。 ３ 特許請求の範囲第１項に記載のフオーカルプ
レンシヤツタにおいて、前記凹部は前記先、後羽
根群のそれぞれのスリツト形成羽根のスリツト形
成エツジの走行軌道に面する前記仕切板に設けら
れていることを特徴とするフオーカルプレンシヤ
ツタ。 ４ 特許請求の範囲第２項又は第３項に記載のフ
オーカルプレンシヤツタにおいて、前記凹部は前
記先羽根群に対向する第１仕切板と前記後羽根群
に対向する第２仕切板とで構成したことを特徴と
するフオーカルプレンシヤツタ。 ５ 特許請求の範囲第４項に記載のフオーカルプ
レンシヤツタにおいて、前記凹部は前記第１仕切
板と前記第２仕切板とを積層したときに一部ズレ
を有する如く該量仕切板に開口を設けて形成した
ことを特徴とするフオーカルプレンシヤツタ。 ６ 特許請求の範囲第２項又は第３項に記載のフ
オーカルプレンシヤツタにおいて、前記凹部は１
枚の仕切板の前記一辺に穿設したことを特徴とす
るフオーカルプレンシヤツタ。[Scope of Claims] 1. A split-blade focal plane comprising a leading blade group and a trailing blade group each having a slit-forming blade having a slit-forming edge, and a partition plate disposed between the leading blade group and the trailing blade group. In the lens shutter, the slit is formed on one side of the partition plate that is parallel to the slit forming edge forming the aperture and facing the raceway surface when the slit forming edge runs in the direction of closing the aperture. A split-blade focal plane shutter characterized by having a predetermined recess that is larger than the amount of penetration of the forming edge. 2. The focal plane shutter according to claim 1, wherein the recess is provided in the partition plate facing the running track of the slit-forming edge of the slit-forming blade of the rear blade group. focal plane ivy. 3. In the focal plane shutter according to claim 1, the recess is provided in the partition plate facing the travel trajectory of the slit forming edge of each of the slit forming blades of the leading and trailing blade groups. Focal plane ivy is characterized by: 4. In the focal plane shutter according to claim 2 or 3, the recessed portion includes a first partition plate facing the leading blade group and a second partition plate facing the trailing blade group. Focal plane ivy is characterized by 5. In the focal plane shutter according to claim 4, the recess has an opening in the partition plate such that when the first partition plate and the second partition plate are stacked, there is a partial misalignment. A focal plane ivy characterized by being formed by providing. 6. In the focal plane shutter according to claim 2 or 3, the recess is 1
A focal plane ivy characterized in that a hole is formed on the one side of the partition plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57085454A JPS58217919A (en) | 1982-05-20 | 1982-05-20 | Split blade focal plane ivy |
| US06/492,719 US4493544A (en) | 1982-05-20 | 1983-05-09 | Focal-plane shutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57085454A JPS58217919A (en) | 1982-05-20 | 1982-05-20 | Split blade focal plane ivy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58217919A JPS58217919A (en) | 1983-12-19 |
| JPH0414330B2 true JPH0414330B2 (en) | 1992-03-12 |
Family
ID=13859324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57085454A Granted JPS58217919A (en) | 1982-05-20 | 1982-05-20 | Split blade focal plane ivy |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4493544A (en) |
| JP (1) | JPS58217919A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4714336A (en) * | 1985-06-14 | 1987-12-22 | Copal Company Limited | Focal plane shutter for cameras |
| JPH0522921Y2 (en) * | 1987-01-21 | 1993-06-11 | ||
| US4963908A (en) * | 1987-09-25 | 1990-10-16 | Canon Kabushiki Kaisha | Shutter for camara |
| JPH0347525U (en) * | 1989-09-19 | 1991-05-02 | ||
| US5266993A (en) * | 1991-10-31 | 1993-11-30 | Nikon Corporation | Focal-plane shutter apparatus |
| US5371565A (en) * | 1991-11-15 | 1994-12-06 | Nikon Corporation | Focal-plane shutter device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546432Y2 (en) * | 1972-03-28 | 1979-03-26 | ||
| JPS4955037U (en) * | 1972-08-23 | 1974-05-15 | ||
| JPS5375410U (en) * | 1976-11-27 | 1978-06-23 | ||
| JPS6131305Y2 (en) * | 1977-12-15 | 1986-09-11 | ||
| JPS5577730A (en) * | 1978-12-06 | 1980-06-11 | Copal Co Ltd | Bound preventing mechanism of focal plane shutter |
-
1982
- 1982-05-20 JP JP57085454A patent/JPS58217919A/en active Granted
-
1983
- 1983-05-09 US US06/492,719 patent/US4493544A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4493544A (en) | 1985-01-15 |
| JPS58217919A (en) | 1983-12-19 |
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